Utility library to read and write Ndef messages from/to a Type4 NFC tag
Dependents: NFC M2M_2016_STM32 MyongjiElec_capstone1 IDW01M1_Cloud_IBM ... more
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NDEF NFC library
This library provides an abstract API to create NDEF formatted messages and records and to read/write them from/to a Type4 NFC Tag.
Implementations
At the moment, the NDEF API is implemented by X_NUCLEO_NFC01A1 and X_NUCLEO_NFC02A1 Dynamic NFC Tag libraries respectively driving the X-NUCLEO-NFC01A1 and X-NUCLEO-NFC02A1 boards.
Message.cpp@4:eaf6c49a86e4, 2015-12-01 (annotated)
- Committer:
- giovannivisentini
- Date:
- Tue Dec 01 08:30:27 2015 +0000
- Revision:
- 4:eaf6c49a86e4
- Parent:
- 1:a0eeb478a45a
- Child:
- 6:739e3211749d
add the possibility to change the record content + add doc
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
giovannivisentini | 0:04b82ae7aa43 | 1 | /* |
giovannivisentini | 0:04b82ae7aa43 | 2 | * Message.cpp |
giovannivisentini | 0:04b82ae7aa43 | 3 | * |
giovannivisentini | 0:04b82ae7aa43 | 4 | * Created on: Nov 6, 2015 |
giovannivisentini | 0:04b82ae7aa43 | 5 | * Author: giovanni visentini |
giovannivisentini | 0:04b82ae7aa43 | 6 | */ |
giovannivisentini | 0:04b82ae7aa43 | 7 | |
giovannivisentini | 0:04b82ae7aa43 | 8 | #include <cstdlib> |
giovannivisentini | 0:04b82ae7aa43 | 9 | #include "NDefLib/Message.h" |
giovannivisentini | 0:04b82ae7aa43 | 10 | #include "RecordType/EmptyRecord.h" |
giovannivisentini | 0:04b82ae7aa43 | 11 | #include "RecordType/RecordText.h" |
giovannivisentini | 1:a0eeb478a45a | 12 | #include "RecordType/RecordAAR.h" |
giovannivisentini | 1:a0eeb478a45a | 13 | #include "RecordType/RecordMimeType.h" |
giovannivisentini | 1:a0eeb478a45a | 14 | #include "RecordType/RecordURI.h" |
giovannivisentini | 0:04b82ae7aa43 | 15 | |
giovannivisentini | 0:04b82ae7aa43 | 16 | namespace NDefLib { |
giovannivisentini | 0:04b82ae7aa43 | 17 | |
giovannivisentini | 4:eaf6c49a86e4 | 18 | uint16_t Message::getByteLength() const { |
giovannivisentini | 4:eaf6c49a86e4 | 19 | uint16_t lenght = 2; //length size |
giovannivisentini | 0:04b82ae7aa43 | 20 | |
giovannivisentini | 4:eaf6c49a86e4 | 21 | if (mRecords.size() == 0) |
giovannivisentini | 4:eaf6c49a86e4 | 22 | return lenght + EmptyRecord().getByteLength(); |
giovannivisentini | 0:04b82ae7aa43 | 23 | |
giovannivisentini | 0:04b82ae7aa43 | 24 | std::vector<Record*>::const_iterator it = mRecords.begin(); |
giovannivisentini | 0:04b82ae7aa43 | 25 | const std::vector<Record*>::const_iterator end = mRecords.end(); |
giovannivisentini | 0:04b82ae7aa43 | 26 | |
giovannivisentini | 4:eaf6c49a86e4 | 27 | for (; it != end; ++it) { |
giovannivisentini | 4:eaf6c49a86e4 | 28 | lenght += (*it)->getByteLength(); |
giovannivisentini | 4:eaf6c49a86e4 | 29 | } //for |
giovannivisentini | 0:04b82ae7aa43 | 30 | |
giovannivisentini | 0:04b82ae7aa43 | 31 | return lenght; |
giovannivisentini | 4:eaf6c49a86e4 | 32 | } //getByteLenght |
giovannivisentini | 0:04b82ae7aa43 | 33 | |
giovannivisentini | 1:a0eeb478a45a | 34 | uint16_t Message::write(uint8_t *buffer) const { |
giovannivisentini | 0:04b82ae7aa43 | 35 | |
giovannivisentini | 4:eaf6c49a86e4 | 36 | const uint16_t length = getByteLength() - 2; |
giovannivisentini | 4:eaf6c49a86e4 | 37 | uint16_t offset = 0; |
giovannivisentini | 4:eaf6c49a86e4 | 38 | buffer[offset++] = (uint8_t) ((length & 0xFF00) >> 8); |
giovannivisentini | 4:eaf6c49a86e4 | 39 | buffer[offset++] = (uint8_t) ((length & 0x00FF)); |
giovannivisentini | 0:04b82ae7aa43 | 40 | |
giovannivisentini | 0:04b82ae7aa43 | 41 | const uint32_t nRecord = mRecords.size(); |
giovannivisentini | 0:04b82ae7aa43 | 42 | |
giovannivisentini | 4:eaf6c49a86e4 | 43 | if (mRecords.size() == 0) { |
giovannivisentini | 4:eaf6c49a86e4 | 44 | offset += EmptyRecord().write(buffer + offset); |
giovannivisentini | 0:04b82ae7aa43 | 45 | return offset; |
giovannivisentini | 4:eaf6c49a86e4 | 46 | } //else |
giovannivisentini | 0:04b82ae7aa43 | 47 | |
giovannivisentini | 4:eaf6c49a86e4 | 48 | for (uint32_t i = 0; i < nRecord; i++) { |
giovannivisentini | 0:04b82ae7aa43 | 49 | Record *r = mRecords[i]; |
giovannivisentini | 0:04b82ae7aa43 | 50 | |
giovannivisentini | 0:04b82ae7aa43 | 51 | r->setAsMiddleRecord(); |
giovannivisentini | 4:eaf6c49a86e4 | 52 | if (i == 0) |
giovannivisentini | 0:04b82ae7aa43 | 53 | r->setAsFirstRecord(); |
giovannivisentini | 4:eaf6c49a86e4 | 54 | if (i == nRecord - 1) |
giovannivisentini | 0:04b82ae7aa43 | 55 | r->setAsLastRecord(); |
giovannivisentini | 0:04b82ae7aa43 | 56 | |
giovannivisentini | 4:eaf6c49a86e4 | 57 | offset += r->write(buffer + offset); |
giovannivisentini | 4:eaf6c49a86e4 | 58 | } //for |
giovannivisentini | 0:04b82ae7aa43 | 59 | |
giovannivisentini | 0:04b82ae7aa43 | 60 | return offset; |
giovannivisentini | 4:eaf6c49a86e4 | 61 | } //write |
giovannivisentini | 0:04b82ae7aa43 | 62 | |
giovannivisentini | 4:eaf6c49a86e4 | 63 | void Message::parseMessage(const uint8_t * const rawNdefFile, |
giovannivisentini | 4:eaf6c49a86e4 | 64 | const uint8_t length, Message *msg) { |
giovannivisentini | 4:eaf6c49a86e4 | 65 | uint16_t offset = 0; |
giovannivisentini | 1:a0eeb478a45a | 66 | Record *r; |
giovannivisentini | 0:04b82ae7aa43 | 67 | |
giovannivisentini | 4:eaf6c49a86e4 | 68 | RecordHeader header; |
giovannivisentini | 4:eaf6c49a86e4 | 69 | do { |
giovannivisentini | 4:eaf6c49a86e4 | 70 | const uint8_t headerLenght = header.loadHeader(rawNdefFile + offset); |
giovannivisentini | 4:eaf6c49a86e4 | 71 | r = RecordText::parse(header, rawNdefFile + offset + headerLenght); |
giovannivisentini | 4:eaf6c49a86e4 | 72 | if (r == NULL) |
giovannivisentini | 4:eaf6c49a86e4 | 73 | r = RecordAAR::parse(header, rawNdefFile + offset + headerLenght); |
giovannivisentini | 4:eaf6c49a86e4 | 74 | if (r == NULL) |
giovannivisentini | 4:eaf6c49a86e4 | 75 | r = RecordMimeType::parse(header, |
giovannivisentini | 4:eaf6c49a86e4 | 76 | rawNdefFile + offset + headerLenght); |
giovannivisentini | 4:eaf6c49a86e4 | 77 | if (r == NULL) |
giovannivisentini | 4:eaf6c49a86e4 | 78 | r = RecordURI::parse(header, rawNdefFile + offset + headerLenght); |
giovannivisentini | 0:04b82ae7aa43 | 79 | |
giovannivisentini | 1:a0eeb478a45a | 80 | offset += header.getRecordLength(); |
giovannivisentini | 1:a0eeb478a45a | 81 | msg->addRecord(r); |
giovannivisentini | 4:eaf6c49a86e4 | 82 | } while (offset < length); |
giovannivisentini | 0:04b82ae7aa43 | 83 | |
giovannivisentini | 0:04b82ae7aa43 | 84 | } |
giovannivisentini | 0:04b82ae7aa43 | 85 | |
giovannivisentini | 0:04b82ae7aa43 | 86 | } /* namespace NDefLib */ |